when white people call me chinese ching chong it's not racism, but when arab people say something about bangladeshi, then of course it's racism? i have a couple guesses as to why you would think this way and it's sad.

You said it was “students” that yelled that. As I mentioned, I had a similar experience in school where another kid mocked my skin color. But these kids aren’t saying that stuff based on some racial ideology. Kids are mean and will pick up on any characteristic to mock other kids. Kids also mocked me for reading during recess. Why should I perceive these instances of childish bullying differently?

The comments by the Arabs, by contrast, is based on a racial ideology. Though I don’t get worked up about it because who cares about a random interaction at the mall? The only thing I’ve ever experienced that I’d call material racism is the social exclusion by Indian people. Because that arises in professional or workplace contexts.